lsblk

sudo mount /dev/sdb1 /media/external

##empty trash

rm -rf /home/*/.local/share/Trash/files/*

sudo du --max-depth 1 --exclude="CSB*" /home/ | sort -h

sudo rsync -aAXv --dry-run --delete --exclude=/dev/* --exclude=/proc/* --exclude=/sys/* --exclude=/tmp/* --exclude=/run/* --exclude=/mnt/* --exclude=/media/* --exclude="swapfile" --exclude="lost+found" --exclude=".cache" --exclude="Downloads" --exclude=".VirtualBoxVMs" --exclude=".ecryptfs" --exclude="CSB_NeuroRad*" --exclude="PROSCIS" --exclude="PRO" /* gpu_server/

sudo rsync -aAXv --delete --exclude="lost+found" gpu_server/user/bin/ /usr/bin/
sudo rsync -aAXv --delete --exclude="lost+found" gpu_server/user/lib/ /usr/lib/

An Ethernet networking interface is a circuit board with an Ethernet port that enables your computer to establish an Ethernet connection. Ethernet interfaces have a simple naming convention. The first Ethernet interface is typically eth0. Then comes eth1. All additional interfaces are named like this.

To view the available Ethernet interfaces, run the following ifconfig command:

ifconfig -a | grep eth

# Output
eth0: flags=4098 mtu 1500

With the lshw command, you can define all the network interfaces you need for configuring networks on Ubuntu. Below you will see an example command. This command will display bus information, driver details, and all its supported capabilities as a single Ethernet interface:

sudo lshw -class network

You can use the file /etc/udev/rules.d/70-persistent-net.rules to configure the logical names for the interface. To control which interface gets which logical name, you will need the physical MAC addresses of the interfaces.

You can find the line that matches the physical MAC address and change NAME=ethA to whatever you want. Reboot your system immediately afterward to save the changes.

With the ethtool program, you can view settings such as auto-negotiation, duplex mode, and port speed. If ethtool is not installed on your server, you can install it using the following command:

sudo apt install ethtool

After the installation is complete, you can see the sample output for eth0:

sudo ethtool eth0

You should remember that the changes you make with the ethtool command are temporary. If you want to keep those settings, you must add the desired ethtool command to a boot statement in the /etc/network/interfaces file.

For example, you want the interface named eth0 to have a connection speed of 500MB/s running in duplex mode. To configure this permanently, you can edit the /etc/network/interfaces file as follows:

The configuration you've seen above also works with other methods like DHCP, even if it's a static method interface.

The path you need to follow for ethernet network configuration in Ubuntu 20.04 is slightly different from older Ubuntu versions. Newer Ubuntu releases (after 18.04) now have /etc/netplan/ instead of /etc/network/interfaces.

With this folder, it is possible to make changes to the ethernet network interface. It is also straightforward to use since it contains a YAML file.

1 . Using Netplan, you can configure the static IP as follows:

ls /etc/netplan

# Output
00-installer-config.yaml

2. Create a backup of this file with the following command:

sudo cp /etc/netplan/00-installer-config.yaml 00-installer-config.yaml.copy

3. Then, open the file with your favorite text editor:

sudo vim /etc/netplan/00-installer-config.yaml

4. Since this is a YAML file, it's easy to make the necessary edits. Edit the file the way you want. Here is an example:

5. After configuring your file as above, save and exit. Apply the necessary changes with the following command:

sudo netplan apply

6. You can now check the changes using the following command:

ip addr